Leitner, J., Hampl, M., Sedmidubský, D., Růžička, K. a Svoboda, P. 2010. Thermodynamic Properties of Mixed Oxides in the CaO-SrO-Bi2O3-Nb2O5-Ta2O5 System. Chemické listy. 104, 3 (dub. 2010).